All Science Fair Projects

Over 1000 FREE Science Fair Project Ideas!

Cave Formations: Stalactite and Stalagmite FormationFeatured science projectScience project video


  • two (2) small glass jars
  • one (1) small plate
  • wool or cotton yarn (thick is best)
  • baking soda or Epsom salt
  • 2 weights such as washers, heavy screws or fishing sinkers
  • water
  • spoon
  • paper and pencil
  • camera (optional)
See our all-time most popular science projects
You might also like these projects
    Search science fair projects Browse science fair projects
    popular science fair projects
    Complexity level:
    Project cost ($):
    Time required:
    The dripping down (stalactite) and building up (stalagmite) will take about 3-5 days. If you want a column to form (the stalactite and stalagmite to touch), this will take over a week.
    Material availability:
    Safety concerns: